Colour cordination?

Cold again but quite bright later. Mr Rat decided to go for a short run to see how his knee was doing (okay) but I couldn't be bothered to get changed.
I did venture out to the postbox (I had been at church in the morning) and was looking for photos when he came back. The t-shirt is even more vivid green than the photo. How many colours?
Our daughter completed the Paris marathon today, it was a lot warmer than here - well done to her in her 1st marathon.